'use strict'
const path = require('path')
const defaultSettings = require('./src/settings.js')

function resolve(dir) {
  return path.join(__dirname, dir)
}

const name = defaultSettings.title || 'Easy Java' // page title

// If your port is set to 80,
// use administrator privileges to execute the command line.
// For example, Mac: sudo npm run
// You can change the port by the following methods:
// port = 8080 npm run dev OR npm run dev --port = 9528
const port = process.env.port || process.env.npm_config_port || 8080 // dev port

// https://www.cnblogs.com/xiaozhu-zhu/p/11946892.html
const FileManagerPlugin = require('filemanager-webpack-plugin')

// All configuration item explanations can be find in https://cli.vuejs.org/config/
module.exports = {
  runtimeCompiler: true, //xxxxx
  /**
   * You will need to set publicPath if you plan to deploy your site under a sub path,
   * for example GitHub Pages. If you plan to deploy your site to https://foo.github.io/bar/,
   * then publicPath should be set to "/bar/".
   * In most cases please use '/' !!!
   * Detail: https://cli.vuejs.org/config/#publicpath
   */
  baseUrl:'/building/',
  publicPath: '/building/',
  outputDir: 'dist',
  assetsDir: 'static',
  lintOnSave: process.env.NODE_ENV === 'development',
  productionSourceMap: false,

  devServer: {
    port: port,
    open: true,
    overlay: {
      warnings: false,
      errors: true
    },
    before: require('./mock/mock-server.js')
  },
  configureWebpack: {
    // provide the app's title in webpack's name field, so that
    // it can be accessed in index.html to inject the correct title.
    name: name,
    resolve: {
      /*alias: {
        '@': resolve('src')
      }*/ //xxxxxx
      extensions: [".js", ".vue", ".json", ".css"],
      alias: {
        vue$: "vue/dist/vue.esm.js",
        "@": resolve("src")
      }
    },

    plugins: [
      // dist -> dist.zip
      new FileManagerPlugin({  //初始化 filemanager-webpack-plugin 插件实例
        onEnd: {
          delete: [   //首先需要删除项目根目录下的dist.zip
            './building-out.zip',
          ],
          archive: [ //然后我们选择dist文件夹将之打包成dist.zip并放在根目录
            {source: './dist', destination: './building-out.zip'},
          ]
        }
      }),
      /*new CompressionPlugin({
        /!*test: /\.js$|\.html$|\.css/,
        deleteOriginalAssets: true // 是否删除原文件*!/
        test: /\.(js|css)(\?.*)?$/i,//需要压缩的文件正则
        threshold: 10240,//文件大小大于这个值时启用压缩
        deleteOriginalAssets: true//压缩后保留原文件
      })*/
    ],

    // wuxiaoyong
    // 配置这个的意思是告诉webpack，这几个不要跟我打包了，不然你又要打包到vendor里面去，
    // 搞得别人体重变重了那么多。声明一下，把其他地方引入vue呀axios呀这些都删了，你在index.html中已经引入了就不需要再引入，
    // 如果不删了，webpack又会打包进去
    externals: {
      'vue': 'Vue',
      'vue-router': 'VueRouter',
      'ElementUI': 'ELEMENT',
      'axios': 'axios',
      'echarts': 'echarts',
    },
  },
  chainWebpack(config) {
    config.plugins.delete('preload') // TODO: need test
    config.plugins.delete('prefetch') // TODO: need test

    // set svg-sprite-loader
    config.module
      .rule('svg')
      .exclude.add(resolve('src/icons'))
      .end()
    config.module
      .rule('icons')
      .test(/\.svg$/)
      .include.add(resolve('src/icons'))
      .end()
      .use('svg-sprite-loader')
      .loader('svg-sprite-loader')
      .options({
        symbolId: 'icon-[name]'
      })
      .end()

    // set preserveWhitespace
    config.module
      .rule('vue')
      .use('vue-loader')
      .loader('vue-loader')
      .tap(options => {
        options.compilerOptions.preserveWhitespace = true
        return options
      })
      .end()

    config
    // https://webpack.js.org/configuration/devtool/#development
      .when(process.env.NODE_ENV === 'development',
        config => config.devtool('cheap-source-map')
      )

    config
      .when(process.env.NODE_ENV !== 'development',
        config => {
          config
            .plugin('ScriptExtHtmlWebpackPlugin')
            .after('html')
            .use('script-ext-html-webpack-plugin', [{
            // `runtime` must same as runtimeChunk name. default is `runtime`
              inline: /runtime\..*\.js$/
            }])
            .end()
          config
            .optimization.splitChunks({
              chunks: 'all',
              cacheGroups: {
                libs: {
                  name: 'chunk-libs',
                  test: /[\\/]node_modules[\\/]/,
                  priority: 10,
                  chunks: 'initial' // only package third parties that are initially dependent
                },
                elementUI: {
                  name: 'chunk-elementUI', // split elementUI into a single package
                  priority: 20, // the weight needs to be larger than libs and app or it will be packaged into libs or app
                  test: /[\\/]node_modules[\\/]_?element-ui(.*)/ // in order to adapt to cnpm
                },
                commons: {
                  name: 'chunk-commons',
                  test: resolve('src/components'), // can customize your rules
                  minChunks: 3, //  minimum common number
                  priority: 5,
                  reuseExistingChunk: true
                }
              }
            })
          config.optimization.runtimeChunk('single')
        }
      )
  }
}
